91RS

You have no idea how much if I'd love to remove this pressure regulator and secondary fuel pump setup. I hate it. Kleemann told me it could never be tuned perfectly for larger injectors and it would lean up at some point during the RPM range. I called them when I was dealing with my hose and leak problems and said I wanted injectors and I didn't care how much it cost and that's what they told me.

I thought dyno tests were supposed to be done in whatever gear is 1:1?

betrezra

My car runs 10.5-11.0 up top dep on weather conditions.

To keep it safe I would stay below 11.5-11.6. I would be happy to give up 30 HP to keep my motor together, since these things cost sooo much to modify.

If you really want it to run the best...... drive to Co Springs and visit the klee shop. I have my car shipped there and then flew out after it was done, got to meet the guys there, and took my brother and my newely tuned car on a long pikes peak trip...... time of our lives.

Then had car shipped back to me. You could drive it back and forth if you have some vacation, but I was busy with work.

Unfortunately there aren't too many people around who can make the kleemann fuel/system work properly short of the klee people.

IF I eventually go to the bigger weistec blower, I'll be pulling all the klee fuel system off and going the bigger injector route and Weistec tune....... probably just ship the car to WT to have it done..... but that depends on if I stay interested in this car or just move on to something else..... 996TT or used BS.

Be patient, you can do some tuning yourself with the Klee manual, AFR, fuel gage, boost gage, etc...... just be patient and be very careful what shop y ou have work on this..... many claim they know... most will just take your money.

GL>

91RS

With my new knowledge, I'd say it's perfectly save going by the dyno graphs with leaning out the fuel pressure regulator a little. It was still around 12:1 between 4k and 5k before and after adjusting it and it's right at 11:1 after between 5k and 6k vs. 10:1 and lower.

I still want to install my AFR gauge permanently so I can keep an eye on it. I've got one more idea to get that damn plug out of my extra bung, but I don't have high hopes.

BonitaBeast

That's what i did for my gauges. I know they're not in the most ideal spot but my passenger can keep a look out for me. At the same time my phone records the data for the runs and I can view them on the computer afterwards.

BonitaBeast

Are you increasing fuel pressure (clockwise on the FPG) or decreasing fuel pressure (counter clockwise on the FPG) to lean out (increase) your AFR?

91RS

I decreased it with about one turn counter clockwise. It doesn't actually affect the fuel pressure until higher RPM anyway. The AFR graphs look the same until about 5k RPM, then you can see the change it made.

BonitaBeast

Oh right. Your AFRs were more on the rich side which is why you decreased the fuel pressure (counter clockwise) to lean it out.

I'm at a steady 12.5 to 12.3 (at redline) AFR on my WOT runs through out the rev range. According to Cory@Kleemann this is the range he'd like to see for AFR.
What many people on this thread are saying however is that it should be around high 11's to low 12's, correct?

91RS

Well the G55 engine looks to have 10.5:1 compression ratio compared to the C55's 11.0:1. I'm not sure how much of a difference that makes, but you might want to richer it up just a bit.

betrezra

91rs - good point!
I'm 10.5-11.2..... and leaving it as is. I've got the higher c/r in the clk55.

Staying conservative on timing and fuel and I've yet to blow up a f/i motor in my years of tinkering......... get a little greedy and get ready to pay the price.

91RS

Just curious, do you know what your timing gets down to on WOT?

BonitaBeast

So I Added fuel about half a turn and now I'm getting 11.7 - 11.4 @ WOT and 5psi boost.

And yes the lower compression on my motor (10.5:1) allows for a slightly higher AFR as confirmed by Kleemann. I'll probably lean it just a tad bit a quarter turn to up the AFR to around 11.9 - 11.6 @ WOT.

I know I'll have to do this whole exercise all over again when the new pulley arrives, but this is what the fun is all about anyway, right?

GT-ER

I would just leave it alone. You won't gain anything by going ever so slightly leaner. Maybe 1-2whp at most.

betrezra

91RS - negative on the timing..... I"ll have to data-log when I get my car back from body shop.

BonitaBeast

I think you're right. After driving home with this setting today, the butt dyno couldn't tell the difference. The AFRs were definitely lower throughout the rev range than before I made the adjustment so I think I should be able to sleep better tonight.